JP7424897B2 - Dolly for transporting precision equipment - Google Patents

Description

The present invention relates to a trolley for transporting precision equipment. In particular, it is a trolley with casters that is open at the front and surrounded by a frame on three sides of the outer periphery, so that it can be easily transported loaded with at least precision equipment that has casters, and that can safely and securely hold the precision equipment inside. Concerning the structure of a trolley for transporting precision equipment.

For example, a box-shaped roll box pallet with casters called a "basket truck" is known. In general, a roll box pallet has a bottom plate with an open front surface on which cargo can be loaded, and a lattice-like frame surrounding the bottom plate on three sides. Roll box pallets can be used to store cargo when loaded, and can be loaded onto trucks when loaded. Roll box pallets are used in many logistics situations because they can be easily unloaded from the front.

By the way, in the conventional "car truck", the bottom plate is arranged at a predetermined height from the floor surface. For this reason, there was a problem in that it required a lot of effort to lower the luggage onto the floor. In order to solve this problem, a ``basket truck'' has been disclosed, in which the bottom plate can be maintained at a predetermined height from the floor, and the bottom plate can land freely on the floor when unloading cargo onto the floor. (For example, see Patent Document 1).

Japanese Patent Application Publication No. 2017-81301

Conventional "basket carts" allow for easy unloading by manual operation, but when transporting electronic precision equipment from the shipping point to the delivery destination using the "basket cart," it is difficult to unload the precision equipment. It is required to be able to hold the inside safely and reliably.

There is a need for a precision equipment transportation trolley that allows precision equipment to be easily unloaded by manual operation and that can safely and reliably hold the precision equipment inside. The above can be said to be the problem of the present invention.

The present invention has been made in view of such problems, and provides a trolley for transporting precision equipment that allows precision equipment to be easily unloaded by manual operation and that can safely and reliably hold precision equipment inside. The purpose is to

The present inventors have proposed a precision equipment transportation trolley that has a plurality of first casters at the bottom and can freely accommodate precision equipment therein, which includes a base rack attached to the bottom of the plurality of second casters, and a base rack that can be moved up and down. A dolly for transporting precision equipment is constructed by a connecting rack connected to the connecting rack, and the connecting rack has a pair of clamping members, one of which can come into contact with the rear surface of the precision equipment, and the other part of which can grip the precision equipment from the side of the equipment. We believed that precision instruments could be held inside safely and reliably by providing this, and based on this idea, we came up with the following new trolley for transporting precision instruments.

(1) The trolley for transporting precision instruments according to the present invention has a plurality of first casters at the bottom, has an open front face to accommodate precision instruments therein, and has a frame surrounding three sides of the outer periphery for use in transporting precision instruments. The trolley includes a base rack having a pair of first lower frame members arranged substantially parallel with a predetermined interval and having a plurality of second casters attached to the bottom, and a pair of base racks connected to the base rack so as to be movable up and down. a box-shaped connecting rack having a second lower frame member with a bottom plate disposed in the center, the connecting rack has a front frame member that stands up from the front part of the second lower frame member, 2. A pair of sides consisting of a rear frame member that stands up from the rear part of the lower frame member and extends substantially parallel to the front frame member, and an upper frame member that connects the tips of the front frame member and the rear frame member. a frame, one or more horizontal ribs that connect the rear frame members of the pair of side frames and are arranged substantially parallel to the bottom plate, and a clamping member in which one piece and the other piece are bent in an L-shape, It has a pair of clamping members that can move along the horizontal ribs, one piece of which can abut against the rear surface of the precision instrument, and the other of which can clamp the precision instrument from a side direction of the precision instrument.

(2) Preferably, the connecting frame further includes a screw jack device that can move the pair of clamping members closer to each other or move them apart.

(3) The connecting frame includes a side bar that is removably spanned between the pair of front frame members, and the side bar can be installed in stages from the front frame member to the rear frame member. is preferred.

(4) The bottom plate is connected to a pair of bar-shaped wheel stops that are movably arranged in the front-rear direction and can stop the first caster of the precision equipment, and is connected to the wheel stop to prevent the first caster from skidding. It is preferable to have a set of restraining piece members.

(5) The brake device further includes a brake device capable of freely braking a wheel provided on the second caster, and the brake device includes a brake pin that can freely move forward and backward toward the outer circumference of the wheel of the second caster, and a brake pin that moves the brake pin toward the outer circumference of the wheel. a compression coil spring that applies a force toward the front; a link mechanism that is connected to the brake pin and that is partially movable up and down along the front frame member; and a bell crank that is disposed at the operating end of the link mechanism. an operating lever, and when the operating lever is rotated in one direction toward the front frame member, the tip edge of the brake pin is moved to the second caster via the link mechanism. When the operating lever is released in a direction away from the outer periphery of the wheel, the tip edge of the brake pin is biased by the compression coil spring and moves toward the outer periphery of the second caster wheel. It is preferable to press .

(6) The precision equipment transportation trolley according to the present invention further includes a pair of lever crank mechanisms disposed on both sides of the connecting rack for raising and lowering the connecting rack with respect to the base rack, and the first lower frame The member has a pair of erected frames erected substantially in parallel, the second lower frame member has an opening for slidably guiding these erected frames, and the lever crank mechanism a crankshaft supporting a support shaft on both sides of the connecting rack that can be raised and lowered integrally with the rack; a crank handle for manually rotating the crankshaft; and a position eccentric from the support shaft in a direction opposite to the crank handle. a crank pin disposed in the vertical direction; the vertical frame has a rectangular cylindrical joint at the top in which the crank pin is movably accommodated in a rectangular opening; the crank handle is rotated in one direction; When the base plate is moved, the bottom plate can be maintained at a predetermined height from the floor by positioning the support shaft above the crank pin and raising the connecting frame with respect to the base frame; When the crank handle is rotated in the other direction, the support shaft is positioned downward with respect to the crank pin, and the connecting rack is lowered relative to the base rack, so that the bottom plate is aligned with the floor surface. to land on.

A precision equipment transporting trolley according to the present invention is a precision equipment transporting trolley that can house precision equipment inside, having a plurality of first casters at the bottom, and a base rack having a plurality of second casters attached to the bottom; It is equipped with a connecting rack that is connected to the base rack so that it can be raised and lowered, and the connecting rack has one piece that can come into contact with the rear surface of the precision equipment and also has a pair of clamping members that can grip the precision equipment from the sides of the precision equipment. , precision equipment can be safely and securely held inside.

FIG. 1 is a plan view showing the configuration of a precision equipment transportation trolley according to an embodiment of the present invention. FIG. 2 is a front view showing the configuration of the precision equipment transportation trolley according to the embodiment. FIG. 2 is a right side view showing the configuration of the precision equipment transportation trolley according to the embodiment. FIG. 2 is a left side view showing the configuration of the precision equipment transportation trolley according to the embodiment. FIG. 2 is a rear view showing the configuration of the precision equipment transportation trolley according to the embodiment. 3 is a sectional view taken along the line AA in FIG. 2. FIG. 3 is a sectional view taken along the line BB in FIG. 2. FIG. FIG. 2 is an enlarged front view of a "lever" crank mechanism provided in the precision equipment transportation trolley according to the embodiment. 9 is a sectional view taken along the line AA in FIG. 8. FIG. FIG. 2 is a perspective view showing the configuration of a "lever" crank mechanism provided in the precision equipment transportation trolley according to the embodiment. FIG. 2 is an enlarged perspective exploded view of the "lever" crank mechanism provided in the precision equipment transportation trolley according to the embodiment. 10 is a state change diagram of FIG. 9, with the crank handle placed in a horizontal state; FIG. It is a state change diagram of FIG. 12, and is a state diagram where the crank handle is arranged below.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of precision equipment transportation trolley]
First, the overall configuration of a precision equipment transportation trolley according to an embodiment of the present invention will be described.

(overall structure)
Next, the overall configuration of a precision equipment transportation trolley according to an embodiment of the present invention will be described. Referring to FIGS. 1 to 7, a precision equipment transportation trolley (hereinafter abbreviated as a trolley) 10 according to an embodiment of the present invention can house therein a precision equipment Ep having a plurality of first casters 1c at the bottom. . The trolley 10 has an open front face and is surrounded by frames on three sides of the outer periphery. The truck 10 includes a base rack 1 and a box-shaped connecting rack 2.

Referring to FIGS. 1 to 7, the base rack 1 has first lower frame members 11 made of a pair of square pipes (see FIG. 2). The pair of first lower frame members 11, 11 extend in the front-rear direction of the truck 10 (see FIG. 3 or 4). The pair of first lower frame members 11, 11 are arranged substantially parallel to each other with a predetermined interval (see FIG. 1 or 2). Further, the first lower frame member 11 has a pair of second casters 2c and 2c attached to the front and rear thereof (see FIG. 3 or 4).

Referring to FIGS. 1 to 7, the connecting frame 2 has second lower frame members 21, 21 each consisting of a pair of square pipes (see FIG. 2). The pair of second lower frame members 21 are connected to the base rack 1 so as to be movable up and down. Furthermore, the connecting rack 2 has a substantially rectangular bottom plate 2b arranged in the center (see FIG. 7).

Referring to FIGS. 1 to 6, the connecting rack 2 includes a pair of side frames 2s and 2s arranged opposite to each other. The side frame 2s is composed of a front frame member 22s, a rear frame member 23s, and an upper frame member 21s.

Referring to FIGS. 1 to 6, the front frame member 22s stands up from the front part of the second lower frame member 21 (see FIG. 3 or 4). The rear frame member 23s stands up from the rear part of the second lower frame member 21 (see FIG. 3 or 4). Further, the rear frame member 23s extends substantially parallel to the front frame member 23. The upper frame member 21s connects the front end portions of the front frame member 22s and the rear frame member 23s (see FIG. 3 or 4). Further, the pair of upper frame members 21s and 21s are detachably connected by a pair of horizontal ribs 21r and 21r (see FIG. 1). Referring to FIG. 3 or 4, the side frame 2s is actually a square pipe bent into a U-shape, and the front frame member 22s, the upper frame member 21s, and the rear frame member 23s are continuous.

Further, referring to FIGS. 3 to 6, the connecting frame 2 includes a pair of horizontal ribs 22r and 22r. The horizontal ribs 22r connect the rear frame members 23s of the pair of side frames 2s. Further, the pair of horizontal ribs 22r, 22r are arranged substantially parallel to the bottom plate 2 with a predetermined interval.

Referring to FIG. 5 or 6, the connecting frame 2 includes a pair of clamping members 41, 41. The holding member 41 has one piece 411 and the other piece 412 bent into an L-shape (see FIG. 6). The holding member 41 has a buffer member 41b attached to its inner surface. The holding member 41 has a crank-shaped bent bracket 4br attached to one piece 411 (see FIG. 6). The bracket 4br slidably holds the horizontal rib 22r (see FIG. 3). This allows the holding member 41 to move along the horizontal ribs 22r.

Referring to FIG. 5 or 6, one piece 411 of the clamping member 41 can come into contact with the rear surface of the precision instrument Ep via the buffer member 41b. Further, the other pieces 412 of the pair of clamping members 41 can clamp the precision instrument Ep from the side direction of the precision instrument Ep via the buffer member 41b (see FIG. 6).

Referring to FIGS. 1 to 6, the trolley 10 according to the embodiment is a precision instrument transporting trolley that can accommodate therein a precision instrument Ep having a plurality of first casters 1c at the bottom, and a plurality of second casters 2c. A base rack 1 is attached to the bottom, and a connecting rack 2 is connected to the base rack 1 so that it can be raised and lowered.One piece 411 of the connecting rack 2 can come into contact with the rear surface of the precision equipment Ep, and the other piece 412 can be attached to the precision equipment Ep. Since it has a pair of clamping members 41, 41 that can clamp the precision instrument Ep from the side direction of the Ep, the precision instrument Ep can be held inside safely and reliably.

(Base rack configuration)
Next, the configuration of the base rack 1 according to the embodiment will be described. Referring to FIG. 3 or 4, the base rack 1 has a shaft 13 erected at the center of the first lower frame member 11. As shown in FIG. The shaft rod 13 protrudes toward the second lower frame member 21. The shaft rod 13 is equipped with a compression coil spring 13s.

On the other hand, referring to FIG. 3 or 4, the second lower frame member 21 has a C-shaped bracket 23b fixed to its upper surface. Referring to FIG. 3, one end of the compression coil spring 13s is in contact with the upper surface of the first lower frame member 11. On the other hand, the other end of the compression coil spring 13s is in contact with the inner wall of the bracket 23b.

In this way, referring to FIG. 3 or 4, the base rack 1 supports the connecting rack 2 with a pair of compression coil springs 13s and 13s. By supporting the connecting frame 2 with a pair of compression coil springs 13s, it is possible to reduce the impact when a crank handle 32 (see FIG. 5), which will be described later, is rotated. Moreover, the impact when transporting the trolley 10 can be alleviated.

(Configuration of connecting rack)
Next, the configuration of the connecting rack 2 according to the embodiment will be explained. Referring to FIGS. 1 to 6, the connecting frame 2 includes a pair of side frames 2s and 2s. A pair of horizontal ribs 22r, 22r are removably installed horizontally on the upper frame members 21s, 21s of the pair of side frames 2s. Thereby, it is possible to suppress the pair of side frames 2s from expanding (see FIG. 1 or 2).

Referring to FIG. 3 or 4, the side frame 2s further includes vertical ribs 24r, 24r made of a pair of square pipes. The upper end of the vertical rib 24r is joined to the upper frame member 21s by welding or the like. Further, the lower end side of the vertical rib 24r is fixed to the second lower frame member 21 with a bracket Br. Further, the vertical rib 24r passes through the first lower frame portion 11 and removably fixes the angle member 2a to its lower end. The bottom plate 2b can be detachably fixed to the pair of angle members 2a (see FIG. 7).

(screw type jack device)
Next, the configuration of the screw type jack device provided in the trolley 10 according to the embodiment will be explained. Referring to FIGS. 3 to 5, the connecting rack 2 includes a pair of screw jack devices (hereinafter abbreviated as jacks) 5. Referring to FIG. 5, since the pair of jacks 5 are arranged symmetrically, the configuration of the jacks 5 will be described below with the right jack 5 as a representative.

Referring to FIG. 5, the jack 5 includes a first link pair 51p, a second link pair 52p, and a screw rod 53. The first link pair 51p has a pair of link arms 51r, 51r rotatably connected via a base 51 by a pin. Similarly, the second link pair 52p has a pair of link arms 52r, 52r rotatably connected via a receiving seat 52 by a pin.

Referring to FIG. 5, in the jack 5, a first link pair 51p and a second link pair 52p are connected in a pantograph shape via a holding connecting portion 54 and an operating connecting portion 55. The jack 5 is configured such that the distance between the holding connecting portion 54 and the operating connecting portion 55 can be expanded or contracted by rotating the screw rod 53.

Referring to FIGS. 3 to 5, one end portion (upper side in FIG. 5) of the screw rod 53 is held relative to the holding connecting portion 54 so as to be rotatable but not to move in the axial direction. Further, one end portion of the screw rod 53 is provided with a rotation operation portion 56 at a position protruding upward from the holding connecting portion 54 . On the other hand, the other end (lower side in FIG. 5) of the screw rod 53 is screwed into an operating connecting portion 55. Thereby, the rotational movement of the screw rod 53 can be converted into the forward and backward movement of the operating coupling part 55.

Referring to FIG. 5, the base 51 is fixed to the other piece 412 of the holding member 41 (see FIG. 6). On the other hand, referring to FIGS. 3 to 5, the receiving seat 52 is fixed to the mounting plate 5b. The mounting plate 5b is fixed across the rear frame member 23s and the vertical rib 24r (see FIG. 3 or 4).

Referring to FIG. 5, when the rotation operation section 56 is operated to rotate the screw rod 53 in one direction, the holding member 41 can be moved toward the rear frame member 23s. On the other hand, when the rotation operation section 56 is operated to rotate the screw rod 53 in the other direction, the holding member 41 can be moved in the direction away from the rear frame member 23s. In this way, by operating the rotation operation section 56, the interval between the pair of clamping members 41, 41 can be adjusted in accordance with the width of the precision instrument Ep.

Referring to FIGS. 3 to 5, the rotation operation section 56 of the jack 5 includes a C-shaped bracket 56b and a rod-shaped handle 56h. The bracket 56b is rotatably connected to one end of the screw rod 53. By rotating the bracket 56b with respect to one end of the screw rod 53, the link arm 51r can be introduced into the inside of the bracket 56b. Thereby, the screw rod 53 can be prevented from rotating.

Referring to FIGS. 3 to 5, the center portion of the handle 56h is joined to the outer surface of the bracket 56b by welding or the like. By attaching the long handle 56h to the bracket 56b, the rotational torque of the screw rod 53 can be reduced.

(Sidebar configuration)
Next, the configuration of the side bar 6 provided on the trolley 10 according to the embodiment will be described. Referring to FIGS. 2 to 4, the connecting frame 2 includes a cylindrical side bar 6. As shown in FIG. The side bar 6 is removably spanned between the pair of front frame members 22s (see FIG. 2). By extending the side bar 6 between the pair of front frame members 22s, 22s, it is possible to prevent the precision instrument Ep from falling off the cart 10. With the side bar 6 removed from the cart 10, the precision equipment Ep can be easily loaded.

On the other hand, referring to FIGS. 2 to 4 and 6, the connecting frame 2 has a pair of receiving fittings 25, 25 that can freely receive the shaft portions 6s, 6s protruding from both ends of the side bar 6. (See Figure 2). The receiving fitting 25 is arranged horizontally from the front frame member 22s to the vertical rib 24 (see FIG. 3 or 4). The receiving fitting 25 is fixed to the front frame member 22s and the vertical rib 24.

Referring to FIG. 3 or 4, the receiving fitting 25 has a plurality of grooves 251 cut out from the upper surface of the receiving plate 25b. These grooves 251 are arranged at a predetermined pitch. The shaft portion 6s of the side bar 6 can be selectively introduced into these grooves 251. In the state shown in FIG. 3 or 4, the shaft portion 6s of the side bar 6 is introduced into the groove 251 in the front row.

2 to 4 and 6, by introducing the shaft portion 6s of the side bar 6 into an arbitrary groove 251 corresponding to the depth of the precision instrument Ep, one piece 411 of the pair of clamping members 41 411 and the side bar 6, the precision instrument Ep can be held in the front and back direction (see FIG. 6). Note that the side bar 6 has a buffer member 6b attached to its outer periphery (see FIG. 2 or FIG. 6).

As described above, referring to FIGS. 2 to 4 and 6, the side bar 6 can be installed in stages from the front frame member 22s to the rear frame member 23s, corresponding to the depth of the precision instrument Ep. Also, with reference to FIGS. 2 to 4, by changing the fixed position of the receiving fitting 25 in the height direction with respect to the front frame member 22s and one vertical rib 24r (see FIG. 3 or 4), the side bar can be fixed. 6 can be set in stages (see Fig. 2).

Further, referring to FIG. 2, the receiving fitting 25 includes a lid member 25a rotatably connected to the receiving plate 25b. After introducing the shaft portion 6s of the side bar 6 into any groove 251, the lid member 25a is rotated so that the lid member 25a closes the groove 251 of the receiving plate 25b, thereby preventing the side bar 6 from falling off.

Further, referring to FIG. 2 or 3, the side bar 6 has a pin portion 6p that protrudes in the centrifugal direction from the shaft portion 6s. On the other hand, the receiving fitting 25 has a hole (not shown) in the bottom surface through which the pin portion 6p can be freely inserted. The holes are opened in correspondence with the pitch of the grooves 251. By introducing the shaft portion 6s of the side bar 6 into an arbitrary groove 251 and inserting the pin portion 6p into this hole, rotation of the side bar 6 around the axis can be suppressed.

(Composition of bottom plate)
Next, the configuration of the bottom plate 2b provided in the trolley 10 according to the embodiment will be described. Referring to FIGS. 1 to 5 and 7, the bottom plate 2b includes a pair of bar-shaped wheel stops 71, 71 and a pair of frame members 72, 72.

Referring to FIG. 7, the bottom plate 2b has a pair of elongated holes h1 and h1 extending in the front-rear direction. By inserting a bolt member into the elongated hole h1 from the bottom side of the bottom plate 2b, inserting the bolt member into the bolt hole opened at both ends of the wheel stopper 71, and fastening a wing nut to the bolt member, the wheel stopper 71 is attached to the bottom plate. It can be fixed to 2b. By loosening the wing nut, the wheel stopper 71 can be moved in the front-back direction with respect to the bottom plate 2b. It is preferable to fix the wheel stopper 71 to the bottom plate 2b in accordance with the pitch in the depth direction of the first caster 1c of the precision instrument Ep.

Referring to FIGS. 1 to 5, the bottom plate 2b is provided with a pair of wheel chocks 71 disposed so as to be movable in the front-rear direction. Thereby, movement of the first caster 1c of the precision instrument Ep in the front-rear direction can be restrained.

Referring to FIG. 7, the pair of block members 72 can move along the longitudinal direction of the wheel stopper 71. The pair of block members 72 are arranged so as to protrude from the side surface of the wheel stopper 71. By loosening a pair of wing nuts 72b, 72b that fasten the block member 72 to the wheel chock 71, the block member 72 can be moved along the longitudinal direction of the wheel chock 71. It is preferable to fix the frame member 72 to the wheel stopper 71 in accordance with the pitch in the width direction of the first caster 1c of the precision instrument Ep.

Referring to FIGS. 1 to 5 and 7, the bottom plate 2b includes a pair of frame members 72, 72 that are movable along the longitudinal direction of the wheel stopper 71. Thereby, movement of the first caster 1c of the precision instrument Ep in the left-right direction can be restrained. In other words, it is possible to suppress the first caster 1c from slipping sideways.

(Configuration of brake device)
Next, the configuration of the brake device 8 provided in the truck 10 according to the embodiment will be described. Referring to FIG. 3 or 4, the truck 10 includes a pair of brake devices 8, 8. The brake device 8 can brake the wheels 2w provided on the second caster 2c.

Referring to FIG. 3 or 4, the brake device 8 includes a brake pin 81p and a compression coil spring 81s. The brake device 8 also includes a link mechanism 82 that connects a plurality of link members, and an operating lever 83 that includes a bell crank.

Referring to FIG. 3 or 4, the brake pin 81p is disposed inside the front-side erected frame 12 of the pair of erected frames 12, 12 erected from the first lower frame member 11. The brake pin 81p is arranged so as to be freely movable toward the outer periphery of the wheel 2w of the second caster 2c. The tip of the brake pin 81p can be retracted from a mounting seat that constitutes the second caster 2c.

Referring to FIG. 3 or 4, the compression coil spring 81s biases the brake pin 81p toward the outer periphery of the wheel 2w.

Referring to FIG. 3 or 4, the link mechanism 82 interconnects a first link member 821, a second link member 822, and a third link member 823. The intermediate portion of the first link member 821 is rotatably connected to the intermediate portion of the brake pin 81p.

In the state shown in FIG. 3 or 4, the other end of the first link member 821 is inclined downward relative to one end. The tip of the brake pin 81p presses the outer periphery of the wheel 2w. By pulling up the other end of the first link member 821, the brake pin 81p can be raised against the compression coil spring 81s, and the tip of the brake pin 81p can be separated from the outer periphery of the wheel 2w.

Referring to FIG. 3 or 4, the second link member 822 is arranged to be movable up and down along the front frame member 22s. The second link member 822 has a frame portion 82c formed at its lower end. The frame portion 82c is connected to the other end portion of the first link member 821 with some play. By raising the second link member 822, the other end of the first link member 821 can be pulled up.

Referring to FIG. 3 or 4, one end of the third link member 823 is rotatably connected to the upper end of the second link member 822, and the other end is connected to the short piece 832 of the operating lever 83. Connected for free rotation. The third link member 823 converts the rotational movement of the operating lever 83 into the linear movement of the second link member 822.

Referring to FIG. 3 or 4, the fulcrum of the operating lever 83 is rotatably connected to the front frame member 22s. In the state shown in FIG. 3 or 4, the long piece 831 of the operating lever 83 is spaced apart from the front frame member 22s. When the long piece 831 of the operating lever 83 is rotated in one direction toward the front frame member 22s (see the imaginary line in FIG. 3 or 4), the tip edge of the brake pin 81p is rotated via the link mechanism 82. The second caster 2c can be separated from the outer periphery of the wheel 2w. In other words, the braking of the second caster 2c can be released.

On the other hand, with reference to FIG. 3 or 4, when the operating lever 83 is released in the direction away from the front frame member 22s, the distal end edge of the brake pin 81p is biased by the compression coil spring 81s to the second caster. The outer periphery of wheel 2w of wheel 2c is pressed. In other words, the second caster 2c can be braked.

In addition, when FIG. 3 or FIG. 4 is referred, 22 s of front frame members are fixing the locking device 84 above the operation lever 83. When the operating lever 83 engages with the locking device 84, the braking of the second caster 2c can be released. When the operating lever 83 is released from the locking device 84, the second caster 2c can be braked. Further, the tip of the brake pin 81p is preferably formed into a conical shape. Thereby, the conical surface of the brake pin 81p can be reliably pressed against the outer peripheral surface of the wheel 2w regardless of the orientation of the wheel 2w.

Referring to FIG. 3 or 4, it is preferable that the brake device 8 according to the embodiment can easily switch between the braking state of the second caster 2c and the braking release state of the second caster 2c by manual operation. Note that since the worker moves the truck 10 while facing the front of the truck 10, it is preferable to provide the brake device 8 in front of the truck 10.

(Configuration of “lever” crank mechanism)
Next, the configuration of the "lever" crank mechanism provided in the truck 10 according to the embodiment will be explained. Referring to FIGS. 1 to 5 and 8 to 13, the truck 10 is equipped with a set of "lever" crank mechanisms 3,3.

Referring to FIGS. 1 to 5 and 8 to 13, a pair of "lever" crank mechanisms 3 are arranged on both sides of the connecting frame 2. As shown in FIGS. A pair of "lever" crank mechanisms 3 can raise and lower the connecting rack 2 with respect to the base rack 1.

Referring to FIG. 3 or 4, the first lower frame member 11 has a pair of erected frames 12, 12 that are erected substantially in parallel. On the other hand, the second lower frame member 21 is provided with an interval to slidably guide these upright frames 12 . Thereby, the connecting rack 2 can be moved only in the height direction with respect to the base rack 1.

Referring to FIGS. 8 to 13, the "lever" crank mechanism 3 includes a crankshaft 31, a crank handle 32, and a crank pin 33. The crankshaft 31 has an intermittent support shaft 31s. The support shaft 31s can be moved up and down together with the connecting frame 2. Further, the support shaft 31s is rotatably supported on both sides of the connecting frame 2.

Referring to FIGS. 2 to 5, the crank handle 32 allows the crankshaft 31 to be manually rotated. Referring to FIGS. 8 to 13, the crank pin 33 is located eccentrically from the center of the support shaft 31s in a direction opposite to the crank handle 32.

On the other hand, referring to FIGS. 5 or 6 to 13, the erected frame 12 has a rectangular cylindrical joint 12j fixed to its upper portion. The joint 12j accommodates the crank pin 33 in an internal rectangular opening 12k in a freely movable manner (see FIGS. 9 or 11 to 13).

As shown in FIG. 2 or 5, when the crank handle 32 is rotated upward, the support shaft 31s is positioned above the crank pin 33. Then, by raising the connecting rack 2 with respect to the base rack 1, the bottom plate 2b can be maintained at a predetermined height from the floor surface FL.

On the other hand, when the crank handle 32 is rotated downward from the state shown in FIG. 2 or 5, the support shaft 31s is positioned below the crank pin 33. Then, by lowering the connecting rack 2 with respect to the base rack 1, the bottom plate 2b can land on or approach the floor surface FL.

Referring to FIGS. 1 to 10, the trolley 10 according to the embodiment includes a base rack 1 having a plurality of second casters 2c attached to the bottom, a connecting rack 2 connected to the base rack 1 so as to be movable up and down, and On the other hand, when a "lever" crank mechanism 3 is provided to raise and lower the connecting frame 2, and the crank handle 32 is rotated in one direction, the bottom plate 2b can be maintained at a predetermined height from the floor surface FL (see FIG. 2 or (see FIG. 3), the precision equipment Ep can be easily moved. On the other hand, when the crank handle 32 is rotated in the other direction, the bottom plate 2b lands on or approaches the floor surface FL, making it easy to lower the precision instrument Ep onto the floor surface FL.

(Configuration of handle holder)
Next, the configuration of the handle presser 26 according to the embodiment will be described. Referring to FIGS. 2 to 4, the side frame 2s further includes a handle presser 26. The handle presser 26 includes a box portion 261 and an L-shaped presser plate 262.

Referring to FIG. 3 or 4, the side frame 2s includes a pair of thin wire members 22p and 22p arranged substantially in parallel. One end of each of these thin wire members 22p and 22p is welded to the upper surface of the bracket 23b. Further, the other ends of these thin wire members 22p and 22p are joined to the upper frame member 21s by welding. That is, the pair of thin wire members 22p and 22p extend substantially parallel to the height direction.

Referring to FIG. 3 or 4, the box portion 261 has a hole (not shown) guided by a pair of thin wire members 22p and 22p. In other words, the handle presser 26 is arranged to be movable in the height direction.

In the state shown in FIG. 3 or 4, the stopper member (not shown), which is stretched between the pair of thin wire members 22p and 22p, is in contact with the box portion 261, so that the handle presser 26 does not descend. , has stopped.

The handle presser 26 is raised from the state shown in FIG. 3 or 4. Next, when the crank handle 32 is rotated upward and the handle holder 26 is released, the handle holder 26 is lowered and the holder plate 262 covers the gripping bar 32b of the crank handle 32 from the outside (Fig. 2 ), the crank handle 32 can be prevented from tilting.

In this way, the trolley 10 according to the embodiment includes the handle presser 26 that maintains the crank handle 32 in a rotated state in one direction.

Subsequently, the configuration of the "lever" crank mechanism 3 according to the embodiment will be explained. In addition, when referring to FIG. 2 or FIG. 5, since the "lever" crank mechanism 3 according to the embodiment has the pair of crankshafts 31 and 31 arranged symmetrically, the right crankshaft 31 is mainly represented. Now, the configuration of the "lever" crank mechanism 3 will be explained.

Referring to FIGS. 8 to 13, the crankshaft 31 includes a pair of J-shaped crank plates 31c, 31c and a pair of support shafts 31s, 31s. The crank plate 31c has a long piece 311 and a short piece 312 arranged to face each other, and the proximal ends of the long piece 311 and the short piece 312 are connected by a connecting plate 313. In reality, the crank plate 31c can be obtained by bending a strip member twice at right angles.

Referring to FIGS. 7 to 12, the long pieces 311 of the pair of crank plates 31c and 31c are arranged to face each other with a predetermined interval therebetween. A pair of long pieces 311, 311 have a crank pin 33 fastened to their tip ends with a bolt member.

Referring to FIGS. 8 to 13, both end surfaces of the support shaft 31s are joined to the inner wall of the long piece 311 and the inner wall of the short piece 312 by welding or the like. The pair of support shafts 31s, 31s are separated by a pair of long pieces 311, 311, but are arranged so that their imaginary centers of rotation coincide.

Referring to FIGS. 8 to 13, the connecting plate 313 of the crank plate 31c is joined to a connecting pole 32p made of a square pipe by welding or the like. The connecting pole 32p constitutes a part of the crank handle 32.

Referring to FIG. 3 or FIG. 8 to FIG. 13, the side frame 2s and the vertical rib 24r are provided with a pair of L-shaped bearing members 34, 34. The bearing member 34 has a U-shaped notch 34u cut out on the distal end side of one piece (see FIG. 11). The support shaft 31s can be introduced into the notch 34u from the outer circumferential direction thereof.

Referring to FIG. 8 or 11, the other part of one bearing member 34 is joined to the front frame member 22s by welding or the like. The other bearing member 34 has another piece joined to the vertical rib 24r by welding or the like. That is, the pair of bearing members 34, 34 is fixed to the side frame 2s or the vertical rib 24r so that the support shaft 31s can be introduced freely (see FIG. 2 or FIG. 5).

Referring to FIGS. 8 to 111, the "lever" crank mechanism 3 further includes a retaining plate 35. As shown in FIG. The retaining plate 35 has a U-shaped notch 35u cut out in its center (see FIG. 11). The support shaft 31s can be introduced into the notch 35u from the outer circumferential direction thereof.

Referring to FIGS. 8 to 11, after introducing the support shaft 31s of the crankshaft 31 into the bearing member 34, the retaining plate 35 is inserted into the support shaft 31s, and the retaining plate 35 is attached to the bearing member 34 with bolts and nuts. By fastening, the crankshaft 31 can be supported integrally with the side frame 2s so as to be freely raised and lowered. Further, the crankshaft 31 can be rotatably supported on the side frame 2s.

(Function of "lever" crank mechanism)
Next, the action of the "lever" crank mechanism 3 will be explained while explaining the operation of the truck 10 according to the embodiment. Referring to FIGS. 1 to 5, the truck 10 is normally held with a pair of crank handles 32 rotated upward.

Referring to FIGS. 1 to 5, since the trolley 10 maintains the bottom plate 2b at a predetermined height from the floor surface FL, the trolley 10 can be easily moved with cargo loaded on the bottom plate 2b. Since the second casters 2c, which can easily roll, are attached to the four corners of the bottom of the base rack 1, the trolley 10 can be easily moved.

On the other hand, when lowering the precision instrument Ep from the bottom plate 2b, if the bottom plate 2b lands on or approaches the floor surface FL, the precision instrument Ep can be easily pulled out. In this case, by rotating one crank handle 32 downward and then rotating the other crank handle 32 downward from the state shown in FIG. 2, the bottom plate 2b can land on or approach the floor surface FL.

As shown in FIG. 9 or FIGS. 12 and 13, the crank pin 33 and the joint 12j are freely connected with a sufficient margin, so that one crank handle 32 and the other crank handle 32 can be operated independently. It can work.

Next, the operation of the truck 10 will be explained based on the configuration of the "lever" crank mechanism 3. As shown in FIGS. 1 to 5, when the bottom plate 2b is maintained at a predetermined height from the floor FL, the entire load of the connecting rack 2 (including the weight of the cargo) is distributed to the four crank pins 33. be done. That is, the connecting frame 2 is supported by four joints 12j (see FIGS. 8 to 11).

Referring to FIG. 9, when the crank handle 32 is rotated counterclockwise about the support shaft 31s, the crank pin 33 moves to the right side of the rectangular opening 12k. Referring to FIG. 9, when the crank pin 33 moves to the right side of the rectangular opening 12k, the movement of the support shaft 31s is restricted only in the vertical direction. The support shaft 31s is lowered using the "lever principle" using the support shaft 33 as a fulcrum. In other words, the connecting rack 2 can be lowered relative to the base rack 1.

Referring to FIG. 9, the behavior of crank pin 33 when crank handle 32 is rotated is not necessarily determined. When the crank handle 32 is slowly rotated, the crank pin 33 is considered to move to the right side due to the weight of the connecting frame 2 while sliding on the lower inner wall of the rectangular opening 12k. On the other hand, when the crank handle 32 is rapidly rotated, the crank pin 33 is considered to move to the right while sliding on the lower inner wall of the rectangular opening 12k after coming into contact with the upper inner wall of the rectangular opening 12k.

When the crank handle 32 is rotated approximately 90 degrees counterclockwise from the state shown in FIG. 8, as shown in FIG. The pin 33 has moved to the rightmost side of the rectangular opening 12k.

When the crank handle 32 is rotated approximately 180 degrees counterclockwise from the state shown in FIG. 9, the support shaft 31s has moved to the lower side of the crank pin 33, as shown in FIG. In the state shown in FIG. 13, the connecting frame 2 is suspended by a pair of crank pins 33, 33.

When the pair of crank handles 32 and 32 are rotated from the state shown in FIG. 2 or 3 to the open state, the connecting rack 2 can be lowered relative to the base rack 1, and the bottom plate 2b can land on or be close to the floor surface FL. can.

Referring to FIG. 13, when the crank handle 32 is rotated clockwise about the support shaft 31s, the crank pin 33 moves to the right side of the rectangular opening 12k. Referring to FIG. 12, when the crank pin 33 moves to the right side of the rectangular opening 12k, the movement of the support shaft 31s is restricted only in the vertical direction. The support shaft 31s rises using the "lever principle" using the support shaft 33 as the fulcrum. In other words, the connecting rack 2 can be raised relative to the base rack 1 (see FIG. 2 or FIGS. 3 and 4).

When the crank handle 32 is rotated approximately 90 degrees clockwise from the state shown in FIG. 13, the support shaft 31s and the crank pin 33 are arranged horizontally in a straight line, and the crank pin 33 has moved to the rightmost side of the rectangular opening 12k.

When the crank handle 32 is rotated approximately 180 degrees clockwise from the state shown in FIG. 13, the support shaft 31s has moved above the crank pin 33, as shown in FIG. In the initial state shown in FIG. 9, the connecting frame 2 is supported by a pair of crank pins 33, 33 (see FIG. 3 or 4).

In order to return the bottom plate 2b to the initial state from the state where it has landed on or is close to the floor surface FL, it is sufficient to rotate the pair of crank handles 32, 32 upward. In this case, see FIGS. 2 to 4. It is preferable to prevent the crank handle 32 from tilting by operating the handle holder 26.

Further, referring to FIGS. 2 to 4, the trolley 10 according to the embodiment further includes a handle holder 26 that maintains the crank handle 32 in a rotated state in one direction, so that tilting of the crank handle 32 is prevented. It can be prevented.

Furthermore, referring to FIG. 3 or 4, the base rack 1 can reduce the impact when the crank handle 32 is rotated by supporting the connecting rack 2 with a pair of compression coil springs 13s and 13s.

[Function of precision equipment transportation trolley]
Next, the operation and effects of the trolley 10 will be explained while explaining the operation procedure of the trolley 10 according to the embodiment. Referring to FIGS. 1 to 7, first, the crank handle 32 is operated (see FIG. 3 or 4) to bring the bottom plate 2b onto or close to the floor surface FL. In this case, it is preferable to release the operating lever 83 and brake the second caster 2c on the front side. Further, it is preferable to remove the pair of front side frame members 72 and the wheel chocks 71 with 72 from the bottom plate 2b (see FIG. 7). The precision equipment Ep can be easily mounted on the bottom plate 2b without climbing over the wheel stopper 71.

Next, referring to FIGS. 1 to 7, the precision equipment Ep is mounted on the bottom plate 2b from the front side of the trolley 10. Next, one jack 5 and the other jack 5 are operated (see FIG. 5) to adjust the interval between the pair of clamping members 41, 41 in accordance with the width of the precision instrument Ep (see FIG. 6). In this case, it is preferable that the rear surface of the precision instrument Ep be brought into contact with one piece 411 of the clamping member 41 via the buffer member 41b.

Next, referring to FIGS. 2 to 4 and 6, the side bar 6 is hung over the pair of receiving fittings 25, 25 in accordance with the depth of the precision instrument Ep. Thereby, the movement of the precision instrument Ep in the front-back direction and the left-right direction can be suppressed via the buffer member 41b of the holding member 41 and the buffer member 6b of the side bar 6.

Next, referring to FIG. 7, a pair of wheel chocks 71 are fixed to the bottom plate 2b in accordance with the pitch in the depth direction of the first caster 1c of the precision instrument Ep. Furthermore, the frame member 72 is fixed to the wheel stopper 71 in accordance with the pitch in the width direction of the first caster 1c. Thereby, the plurality of first casters 1c can be stopped on the bottom plate 2b.

Next, referring to FIGS. 1 to 7, the crank handle 32 is operated (see FIG. 3 or 4) to raise the bottom plate 2b from the floor FL. Next, by grasping the pair of operating levers 83, 83 and releasing the braking of the second casters 2c on the front side, the trolley 10 can be easily moved with the precision equipment Ep accommodated inside the trolley 10. Can be moved.

Referring to FIGS. 1 to 6, the trolley 10 according to the embodiment is a precision instrument transporting trolley that can accommodate therein a precision instrument Ep having a plurality of first casters 1c at the bottom, and a plurality of second casters 2c. A base rack 1 is attached to the bottom, and a connecting rack 2 is connected to the base rack 1 so that it can be raised and lowered.One piece 411 of the connecting rack 2 can come into contact with the rear surface of the precision equipment Ep, and the other piece 412 can be attached to the precision equipment Ep. Since it has a pair of clamping members 41, 41 that can clamp the precision instrument Ep from the side direction of the Ep, the precision instrument Ep can be held inside safely and reliably.

Further, referring to FIGS. 3 to 5, the connecting frame 2 is further equipped with a pair of screw jack devices 5 that can bring the pair of clamping members 41 closer to or apart from each other, so that the precision equipment Ep The pair of holding members 41, 41 can be easily and reliably moved in accordance with the width.

Furthermore, referring to FIGS. 2 to 4 and 6, the connecting frame 2 includes a side bar 6 that is removably spanned between a pair of front frame members 22s, and the side bar 6 is connected to the front frame member 22s. Since it can be installed stepwise from 22s to the rear frame member 23s, it can work together with the pair of clamping members 41, 41 to safely and reliably restrict the movement of the precision instrument Ep in the front-rear direction.

Further, referring to FIGS. 1 to 5 and 7, the bottom plate 2b includes a pair of wheel chocks 71, 71 that can restrain the first caster 1c of the precision equipment Ep, and a pair of wheel chocks 71 that can restrain the first caster 1c from skidding. Since the top members 72, 72 are provided, movement of the first caster 1c in the front-back direction can be restrained.

Furthermore, referring to FIG. 3 or 4, the trolley 10 further includes a set of brake devices 8, 8 that can freely brake the wheels 2w provided on the second caster 2c, and the brake device 8 brakes or releases the wheels 2w. Since a manually operable operation lever 83 is provided in the front, the braking state of the second caster 2c and the braking release state of the second caster 2c can be easily switched by manual operation.

Further, referring to FIGS. 1 to 13, the trolley 10 according to the embodiment includes a base rack 1 having a plurality of second casters 2c attached to the bottom, a connecting rack 2 connected to the base rack 1 so as to be able to rise and lower, and a base rack. 1, and when the crank handle 32 is rotated in one direction, the bottom plate 2b can be maintained at a predetermined height from the floor FL (Fig. 2), the precision equipment Ep can be easily moved. On the other hand, when the crank handle 32 is rotated in the other direction, the bottom plate 2b lands on the floor FL, making it easy to lower the precision instrument Ep onto the floor FL.

The present invention has disclosed a trolley for transporting precision instruments that can transport precision instruments safely and reliably, but the outer dimensions of the trolley for transporting precision instruments according to the present invention are set so that it can be mounted on an aircraft cart. It is preferable.

1 Base rack 1c First caster 2 Connecting rack 2b Bottom plate 2c Second caster 2s/2s Pair of side frames 10 Dolly (truck for transporting precision equipment)
11・11 Pair of first lower frame members 21・21 Pair of second lower frame members 21s Upper frame member 22s Front frame member 22r Lateral rib 23s Rear frame member 41・41 Pair of clamping members 411 One piece 412 Other piece Ep Precision instrument

Claims (5)

A movable trolley for transporting precision equipment, which has a plurality of first casters at the bottom, has an opening at the front so that precision equipment can be housed therein, and has a frame surrounding three sides of the outer periphery,
a base rack having a pair of first lower frame members arranged substantially parallel with a predetermined interval and having a plurality of second casters attached to the bottom;
a box-shaped connecting frame having a pair of second lower frame members connected to the base frame in a vertically movable manner and having a bottom plate disposed in the center;
The connecting rack is
a front frame member standing up from the front part of the second lower frame member; a rear frame member standing up from the rear part of the second lower frame member and extending substantially parallel to the front frame member; and the front frame member and the rear frame member. a pair of side frames configured with an upper frame member that connects the leading ends of the frame members;
one or more horizontal ribs that connect the rear frame members of the pair of side frames and are arranged substantially parallel to the bottom plate;
The holding member has one piece and the other bent in an L-shape, and is movable along the horizontal rib, and one piece can come into contact with the rear surface of the precision instrument, and the other piece can touch the precision instrument from the side direction of the precision instrument. A pair of clamping members capable of clamping a precision instrument;
The connecting rack further includes a screw jack device that can move the pair of clamping members closer to each other or farther apart .
The connecting frame includes a side bar that is removably spanned between the pair of front frame members,
The trolley for transporting precision equipment according to claim 1 , wherein the side bar can be installed in stages from the front frame member to the rear frame member.
The bottom plate is
a pair of bar-shaped wheel stops that are movably arranged in the front-rear direction and can stop a first caster of the precision equipment;
The precision equipment transportation trolley according to claim 1 or 2 , further comprising a set of frame members connected to the wheel stopper and for suppressing skidding of the first caster.
Further comprising a brake device capable of freely braking wheels provided on the second caster,
The brake device includes:
a brake pin that can freely move forward and backward toward the outer periphery of the wheel of the second caster;
a compression coil spring that biases the brake pin toward the outer periphery of the wheel;
a link mechanism connected to the brake pin, a part of which is movable up and down along the front frame member;
an operating lever consisting of a bell crank disposed at the operating end of the link mechanism;
When the operating lever is rotated in one direction toward the front frame member, the tip edge of the brake pin can be separated from the outer periphery of the wheel of the second caster via the link mechanism,
When the operating lever is released in a direction away from the front frame member, the tip end edge of the brake pin is urged by the compression coil spring and presses the outer periphery of the wheel of the second caster . The precision equipment transportation trolley according to any one of Items 1 to 3 .
further comprising a pair of lever crank mechanisms disposed on both sides of the connecting rack for raising and lowering the connecting rack with respect to the base rack,
The first lower frame member has a pair of erected frames that are erected substantially in parallel;
The second lower frame member has an opening that slidably guides these erected frames,
The lever crank mechanism is
a crankshaft supporting a support shaft that can be raised and lowered integrally with the connecting frame on both sides of the connecting frame;
a crank handle for manually rotating the crankshaft;
a crank pin disposed eccentrically from the spindle in a direction opposite to the crank handle;
The erected frame has a rectangular cylindrical joint at the top in which the crank pin is movably accommodated in a rectangular opening therein;
When the crank handle is rotated in one direction, the support shaft is positioned upward relative to the crank pin, and the connecting rack is raised relative to the base rack, so that the bottom plate is aligned with the floor surface. can be maintained at a predetermined height from
When the crank handle is rotated in the other direction, the support shaft is positioned downward with respect to the crank pin, and the connecting frame is lowered relative to the base frame, so that the bottom plate is aligned with the floor surface. The precision equipment transportation trolley according to any one of claims 1 to 4 , wherein the precision equipment transportation trolley is made to land on a .

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